React.js is a component library, which expresses user interfaces in terms of components, properties passed into them, and state they manage internally. Through these encapsulated, expressive and composable building blocks, we can create complex and dynamic interfaces with code that is surprisingly simple and easy to manage.

As a non-blocking programming language with amazing concurrency capabilities, it is no surprise that JavaScript shines just as brightly on the server side as it does in a browser. Whether you are making a build tool, web application or API, the rich JavaScript ecosystem and Node core libraries are by your side.